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authorMichael Niedermayer <michaelni@gmx.at>2007-01-14 21:40:21 +0000
committerMichael Niedermayer <michaelni@gmx.at>2007-01-14 21:40:21 +0000
commit597e3232ef9b65a1df9f8b9ae37d70547a680bd2 (patch)
treef2e65b4be47cb41a4025ee093214db2d0994c106 /libavutil/aes.c
parent7200f5d054421484f1326ff5e25340629154b421 (diff)
simplify
Originally committed as revision 7504 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavutil/aes.c')
-rw-r--r--libavutil/aes.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/libavutil/aes.c b/libavutil/aes.c
index d649dfa29f..f14523bfc6 100644
--- a/libavutil/aes.c
+++ b/libavutil/aes.c
@@ -99,22 +99,16 @@ void av_aes_encrypt(AVAES *a){
crypt(a, 2, sbox, enc_multbl);
}
-static void init_multbl3(uint8_t tbl[4][256][4]){
- int i, j, k;
- for(k=1; k<4; k++)
- for(j=0; j<256; j++)
- for(i=0; i<4; i++)
- tbl[k][j][i]= tbl[k-1][j][(i-1)&3];
-}
-
static void init_multbl2(uint8_t tbl[1024], int c[4], uint8_t *log8, uint8_t *alog8, uint8_t *sbox){
- int i;
+ int i, j;
for(i=0; i<1024; i++){
int x= sbox[i/4];
if(x) tbl[i]= alog8[ log8[x] + log8[c[i&3]] ];
}
#ifndef CONFIG_SMALL
- init_multbl3(tbl);
+ for(j=256; j<1024; j++)
+ for(i=0; i<4; i++)
+ tbl[4*j+i]= tbl[4*j + ((i-1)&3) - 1024];
#endif
}